Why would Jesus, so non-judgmental, now become a judge? Why a judge of Israel and not others with whom he non-judgmentally associated? Would Jesus exclude anyone, in judging, or not in not judging?
Perhaps this "data" has some source in Jesus' self-evaluation and evoking in others the reach for higher goals. Warped in to a legalistic rule set this heuristic might be thought to be "judging" but what Jesus taught only works through self-acceptance and acceptance of what has been as a basis for going on.
The above applies to both those who "stood by me"/"followed me" as well as to those judged to be this or that.